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研究对象为退役混凝土泵车(服役18500 h)的臂架高强钢材料WELDOX960E,通过疲劳试验,获得了S-N疲劳寿命曲线;通过尖端张开位移测试试验,记录了材料P-V曲线,绘制出了δ_R-Δa阻力曲线;从试验获取退役臂架高强钢材料的力学性能,分析了退役泵车臂架的再制造价值。
The object of study is the WELDOX960E high-strength steel arm material for the decommissioned concrete pump truck (18,500 h), and the SN fatigue life curve is obtained through the fatigue test. The PV curve of the material is recorded through the tip open displacement test and the δ_R- Δa resistance curve; obtained from the test mechanical properties of high strength steel arm jib, analyzed the remanufactured truck arm boom value.